Word:

# Complement

Com´ple`ment
n.1.That which fills up or completes; the quantity or number required to fill a thing or make it complete.
2.That which is required to supply a deficiency, or to complete a symmetrical whole.
History is the complement of poetry.
3.Full quantity, number, or amount; a complete set; completeness.
4.(Math.) A second quantity added to a given quantity to make it equal to a third given quantity.
5.Something added for ornamentation; an accessory.
6.(Naut.) The whole working force of a vessel.
7.(Mus.) The interval wanting to complete the octave; - the fourth is the complement of the fifth, the sixth of the third.
8.A compliment.
 Arithmetical compliment of a logarithm See under Logarithm.
 Arithmetical complement of a number (Math.) the difference between that number and the next higher power of 10; as, 4 is the complement of 6, and 16 of 84.
 Complement of an arc (Geom.) the difference between that arc or angle and 90°.
 Complement of a parallelogram (Math.) See Gnomon.
 In her complement (Her.) said of the moon when represented as full.
v. t.1.To supply a lack; to supplement.
2.To compliment.
 Noun 1 complement - a word or phrase used to complete a grammatical construction 2 complement - a complete number or quantity; "a full complement" 3 complement - number needed to make up whole force; "a full complement of workers"Synonyms: full complement 4 complement - something added to complete or make perfect; "a fine wine is a perfect complement to the dinner" 5 complement - one of a series of enzymes in the blood serum that are part of the immune response 6 complement - either of two parts that mutually complete each other Verb 1 complement - make complete or perfect; supply what is wanting or form the complement to; "I need some pepper to complement the sweet touch in the soup"
 (logic) complement - The other value or values in the set of possible values.See logical complement, bitwise complement, set complement.